Home / 1,191.51-1,635.47-1,140.77

Finding the Fourth Proportional to 1,191.51, 1,635.47 and 1,140.77

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Solution

The fourth proportional to 1,191.51, 1,635.47 and 1,140.77 is: 1,565.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.51 : 1,635.47 = 1,140.77 : x
  2. Step 2: Convert to fraction form
    1,191.51/1,635.47 = 1,140.77/x
  3. Step 3: Cross multiply
    1,191.51x = 1,635.47 × 1,140.77
  4. Step 4: Simplify right side
    1,191.51x = 1,865,681.23
  5. Step 5: Solve for x
    x = 1,865,681.23/1,191.51
  6. Step 6: Final answer
    x = 1,565.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.